WO2011048038A2 - Generator - Google Patents

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Publication number
WO2011048038A2
WO2011048038A2 PCT/EP2010/065607 EP2010065607W WO2011048038A2 WO 2011048038 A2 WO2011048038 A2 WO 2011048038A2 EP 2010065607 W EP2010065607 W EP 2010065607W WO 2011048038 A2 WO2011048038 A2 WO 2011048038A2
Authority
WO
WIPO (PCT)
Prior art keywords
generator
yoke
air
stator
channel
Prior art date
Application number
PCT/EP2010/065607
Other languages
German (de)
French (fr)
Other versions
WO2011048038A3 (en
Inventor
Frank Seibicke
Joachim Mucha
Jörg WASCHEK
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to US13/502,948 priority Critical patent/US9106109B2/en
Priority to EP10775740A priority patent/EP2491642A2/en
Priority to CN201080047781.XA priority patent/CN102577044B/en
Publication of WO2011048038A2 publication Critical patent/WO2011048038A2/en
Publication of WO2011048038A3 publication Critical patent/WO2011048038A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/60—Cooling or heating of wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the invention relates to a generator.
  • the cooling of a stator of a generator is based on commercial ⁇ union generators on closed cooling circuits with additional additional coolers (eg air-air or air-water cooler).
  • closed cooling circuits are technically complex and require an additional cooling medium, such. Water. Furthermore, closed cooling circuits of generators, as already mentioned, require recoolers.
  • the generator is designed such that the air is discharged from the exit channel into the surrounding ⁇ ambient air of the generator in the direction of the axis of rotation of the generator, there can be reliably prevented that the warm exhaust air does not prematurely he ⁇ neut is sucked in as air for cooling.
  • the yoke in the circumferential direction of the yoke has extending grooves and the cooling channels are formed by the grooves. In this way, both particularly good cooling of the yoke of the stator can be achieved, and a particularly simple mechanical structure of the stator can be achieved.
  • the generator can e.g. be designed as a wind power generator.
  • the generator 1 which is in the form of a wind power generator in the exemplary embodiment, has a stator 3 which is arranged stationary in relation to the site of the generator and a rotor 2 rotatably arranged about a rotation axis Z of the generator.
  • a stator 3 which is arranged stationary in relation to the site of the generator and a rotor 2 rotatably arranged about a rotation axis Z of the generator.
  • Some elements of the rotor 2 are shown in FIG 1, for the sake of clarity and as for the understanding of the invention immaterial, only highly schematic in the form of two rectangles.
  • the rotor 2 has in the context of the embodiment
  • the rotor 2 comprises the elements of the generator 1 which rotate about the rotation axis Z during operation of the generator 1.
  • the rotor 2 rotates about the rotation axis Z during operation of the generator 1.
  • An air gap 17 is arranged between the rotor 2 and the stator 3. Since, during operation of the generator 1, the rotor 2 rotates about the stator 3 arranged in the center of the generator 1, in the exemplary embodiment the generator 1 is realized as a so-called external rotor.
  • the stator 3 has a yoke 21 as an essential element.
  • the yoke 21 consists in the context of the exemplary embodiment. play from in the direction of the rotation axis Z successively arranged sheets, which together form a so-called laminated core.
  • the individual sheets are thereby provided in the re ⁇ gel with an electrically insulating layer, for example a lacquer layer.
  • the sheets have in the direction of the axis of rotation Z through the sheets extending recesses in which the electrical windings of the stator are arranged.
  • the ends 4 of a winding emerging from the sheets at the longitudinal ends are shown.
  • the yoke 21 is in the context of the invention of a laminated core. But it is also possible that the yoke 21 is composed instead of individual sheets, solid initiallybil ⁇ det and consists of a solid material, such as one or more massive iron workpieces.
  • the stator 3 has two fans 6a and 6b, which have their own electric drive 22a and 22b. Since the fans 6a and 6b do not depend on the rotation of the rotor 2, but each have their own electrical drive (electric motor) assigned to them, such fans are also referred to as so-called external fans in a specific manner.
  • the fans 6a and 6b have an air inlet opening 8a and 8b.
  • the two fans 6a and 6b suck in the operation of the fan air from the ambient air of the generator 1, which is represented by two arrows 7a and 7b in figures. It should be noted at this point that the arrows shown in Figures 1, 2 and 3, the direction of the air flow, which serves to cool the stator represent.
  • stator 3 in the context of the embodiment two in relation to the inlet channels 5a and 5b in the circumferential direction T of the yoke 21 are arranged offset ⁇ outlet channels 20a and 20b.
  • the offset need not necessarily be 90 °, with an angle of 90 ° in the arrangement according to the embodiment, however, ensures that the stator 3 and in particular the yoke 21 is cooled over the entire circumference of the stator 3.
  • the inlet channel 5a is connected via the cooling channels 16 and 16a 'and the inlet channel 5b via the cooling channels 16b and 16b' to the outlet channels 20a and 20b such that the air from the inlet channel 5a through the cooling channels 16a and 16a 'and the air from the inlet channel ⁇ 5b through the cooling channels 16b and 16b' passes into the outlet channels 20a and 20b, which is represented by the entspre ⁇ sponding arrows in Figures 1, 2 and in Fig. 3
  • the air then flows out through channels in the region of the exit 20a and 20b arranged openings 15a and 15b of Sta ⁇ tors 3 and distributed over the circumference of the rotor 2 ⁇ air outlet openings 23 of the generator 1 in the ambient air.
  • the cooling channels can also be formed, for example, by pipelines, in particular pipelines, which have a square or rectangular cross-section and are arranged on the yoke in FIG Circumferential direction T of the yoke 21 run and have a heat-conducting contact with the yoke, be realized.
  • the generator has two fans, and, correspondingly, two inlet and two from ⁇ passageways.
  • the generator may also include only a single fan and only a single inlet channel and only a single outlet channel, or it can also be more like two fans and thus also have more like two inlet channels and more like two From ⁇ passageways.

Abstract

The invention relates to a generator, wherein the generator comprises a stationary stator and a rotor disposed rotatably about an axis of rotation, wherein the stator comprises a fan drawing air from the ambient air around the generator, wherein the inlet channel is disposed such that the air drawn in by the fan is distributed at the core of the stator by the channel over the length of the core in the direction of the axis of rotation, wherein cooling channels running in the circumferential direction of the core and distributed over the length of the core are disposed on the core, wherein the stator comprises an outlet channel disposed offset in the circumferential direction of the core with respect to the inlet channel, wherein the inlet channel is connected to the outlet channel by means of the cooling channels, such that the air from the inlet channel flows through the cooling channels into the outlet channel. The invention relates to a generator wherein no additional cooling medium is required for cooling the stator of the generator.

Description

Beschreibung description
Generator Die Erfindung betrifft einen Generator. Generator The invention relates to a generator.
Die Kühlung eines Stators eines Generators, insbesondere ei¬ nes Stators eines Windkraftgenerators, basiert bei handelsüb¬ lichen Generatoren auf geschlossenen Kühlkreisläufen mit zu- sätzlichen Rückkühlern (z.B. Luft-Luft- oder Luft-Wasser- Kühler) . The cooling of a stator of a generator, in particular ei ¬ nes stator of a wind power generator is based on commercial ¬ union generators on closed cooling circuits with additional additional coolers (eg air-air or air-water cooler).
Geschlossene Kühlkreisläufe sind aber technisch aufwändig und benötigen ein zusätzliches Kühlmedium, wie z.B. Wasser. Wei- terhin benötigen geschlossene Kühlkreisläufe von Generatoren, wie schon gesagt, Rückkühler. But closed cooling circuits are technically complex and require an additional cooling medium, such. Water. Furthermore, closed cooling circuits of generators, as already mentioned, require recoolers.
Es ist Aufgabe der Erfindung einen Generator zu schaffen, wobei zur Kühlung des Stators des Generators kein zusätzliches Kühlmedium, wie z.B. Wasser, benötigt wird. It is an object of the invention to provide a generator, wherein for cooling the stator of the generator no additional cooling medium, such as. Water is needed.
Diese Aufgabe wird gelöst durch einen Generator , wobei der Generator einen ruhend angeordneten Stator und einen um eine Rotationsachse rotierbar angeordneten Rotor aufweist, wobei der Stator ein Joch und einen Lüfter aufweist, der Luft aus der Umgebungsluft des Generators ansaugt, wobei der Stator einen Eintrittskanal aufweist in den der Lüfter die Luft bläst, wobei der Eintrittskanal derart angeordnet ist, dass er die vom Lüfter angesaugte Luft am Joch über die in Rich- tung der Rotationsachse verlaufende Länge des Jochs verteilt, wobei am Joch in Umfangsrichtung des Jochs verlaufende, über die Länge des Jochs verteilte Kühlkanäle angeordnet sind, wo¬ bei der Stator einen im Bezug auf den Eintrittskanal in Um- fangsrichtung des Jochs versetzt angeordneten Austrittskanal aufweist, wobei der Eintrittskanal über die Kühlkanäle mit dem Austrittskanal derart verbunden ist, dass die Luft von dem Eintrittskanal durch die Kühlkanäle hindurch in den Aus¬ trittskanal strömt, wobei der Generator derart ausgebildet ist, dass die durch den Austrittskanal strömende Luft in die Umgebungsluft des Generators abgegeben wird. This object is achieved by a generator, wherein the generator has a stationary arranged stator and a rotor arranged rotatably about a rotation axis, wherein the stator has a yoke and a fan which sucks air from the ambient air of the generator, wherein the stator has an inlet channel in which the fan blows the air, wherein the inlet channel is arranged such that it distributes the air sucked by the fan at the yoke over the length of the yoke extending in the direction of the axis of rotation, wherein the yoke extends in the circumferential direction of the yoke over the length of the yoke distributed cooling channels are arranged, where ¬ in a stator circumferential direction with respect to the inlet duct in environmental of the yoke staggered outlet channel, said inlet channel is connected to the cooling channels with the outlet channel such that the air from the inlet passage through the Cooling channels through in the ¬ outlet passage Ström t, wherein the generator is formed in such a way is that the air flowing through the outlet channel air is discharged into the ambient air of the generator.
Durch die erfindungsgemäße in Umfangsrichtung des Jochs ver- laufende Kühlluftführung wird eine besonders effektive Küh¬ lung des Stators erreicht. Comparable by the invention in the circumferential direction of the yoke current cooling air flow is achieved a particularly effective Küh ¬ development of the stator.
Vorteilhafte Ausbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Advantageous embodiments of the invention will become apparent from the dependent claims.
Es erweist sich als vorteilhaft, wenn der Generator derart ausgebildet ist, dass die Luft vom Austrittkanal in die Umge¬ bungsluft des Generators in Richtung der Rotationsachse des Generators abgegeben wird, da dadurch zuverlässig verhindert werden kann, dass die warme Austrittsluft nicht vorzeitig er¬ neut als Luft zum Kühlen angesaugt wird. It proves to be advantageous if the generator is designed such that the air is discharged from the exit channel into the surrounding ¬ ambient air of the generator in the direction of the axis of rotation of the generator, there can be reliably prevented that the warm exhaust air does not prematurely he ¬ neut is sucked in as air for cooling.
Weiterhin erweist es sich als vorteilhaft, wenn das Joch in Umfangsrichtung des Jochs verlaufende Nuten aufweist und die Kühlkanäle durch die Nuten gebildet werden. Hierdurch kann sowohl besonders gute Kühlung des Jochs des Stators erreicht werden, als auch ein besonders einfacher mechanischer Aufbau des Stators erzielt werden. Der Generator kann dabei z.B. als Windkraftgenerator ausgebildet sein. Furthermore, it proves to be advantageous if the yoke in the circumferential direction of the yoke has extending grooves and the cooling channels are formed by the grooves. In this way, both particularly good cooling of the yoke of the stator can be achieved, and a particularly simple mechanical structure of the stator can be achieved. The generator can e.g. be designed as a wind power generator.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher erläutert. Dabei zei- gen: An embodiment of the invention is illustrated in the drawing and will be explained in more detail below. Show:
FIG 1 eine längs der Rotationsachse verlaufende schemati¬ sierte Schnittansicht eines erfindungsgemäßen Gene¬ rators, 1 is a longitudinal axis of rotation extending schemati ¬ catalyzed cross-sectional view of an inventive genes ¬ rators,
FIG 2 eine senkrecht zur Rotationsachse verlaufende sche¬ matisierte Schnittansicht eines erfindungsgemäßen Generators und 2 shows a plane perpendicular to the axis of rotation sche ¬ mated sectional view of a generator according to the invention and
FIG 3 eine Detailansicht von FIG 1. Im Folgenden wird anhand von FIG 1, FIG 2 und FIG 3 ein Aus¬ führungsbeispiel der Erfindung beschrieben. Gleiche Elemente sind dabei in den drei Figuren mit den gleichen Bezugszeichen versehen. FIG 3 zeigt dabei einen Detailausschnitt von FIG 1, in der die wesentlichen Elemente der Erfindung vergrößert dargestellt sind. In FIG 1 ist dabei, wie schon gesagt, eine längs der Rotationsachse Z verlaufende Schnittansicht durch den Generator und insbesondere durch den Stator des Genera- tors dargestellt. In FIG 2 ist der zu FIG 1 zugehörige senk¬ recht zur Rotationsachse Z verlaufende Schnitt dargestellt, wobei in FIG 2, der Übersichtlichkeit halber, einige Elemente des Rotors nicht dargestellt sind. Bei allen drei Figuren sind der Übersichtlichkeit halber nur die zum Verständnis der Erfindung wesentlichen Elemente des Generators 1 dargestellt. 3 shows a detailed view of FIG. 1 In the following, an exemplary embodiment of the invention will be described with reference to FIG. 1, FIG. 2 and FIG. The same elements are provided in the three figures with the same reference numerals. FIG. 3 shows a detailed detail of FIG. 1, in which the essential elements of the invention are shown enlarged. In FIG. 1, as already stated, a sectional view running along the axis of rotation Z is represented by the generator and in particular by the stator of the generator. In FIG 2, the corresponding to FIG 1 perpendicular to the rotation axis Z ¬ right is shown running section, with some elements of the rotor are not shown in FIG 2, for clarity. For the sake of clarity, only the elements of the generator 1 essential for understanding the invention are shown in all three figures.
Der erfindungsgemäße Generator 1, der im Rahmen des Ausführungsbeispiels in Form eines Windkraftgenerators vorliegt, weist einen in Bezug auf den Aufstellungsort des Generators ruhend angeordneten Stator 3 und einen um eine Rotationsachse Z des Generators rotierbar angeordnete Rotor 2 auf. Einige Elemente des Rotor 2 sind in FIG 1, der Übersichtlichkeit halber und da zum Verständnis der Erfindung unwesentlich, nur stark schematisiert in Form von zwei Rechtecken dargestellt. Der Rotor 2 weist dabei im Rahmen des AusführungsbeispielsThe generator 1 according to the invention, which is in the form of a wind power generator in the exemplary embodiment, has a stator 3 which is arranged stationary in relation to the site of the generator and a rotor 2 rotatably arranged about a rotation axis Z of the generator. Some elements of the rotor 2 are shown in FIG 1, for the sake of clarity and as for the understanding of the invention immaterial, only highly schematic in the form of two rectangles. The rotor 2 has in the context of the embodiment
Permanentmagnete zur Erzeugung eines Magnetfelds auf, die der Übersichtlichkeit halber nicht dargestellt sind. Der Rotor 2 umfasst die im Betrieb des Generators 1 um die Rotationsachse Z rotierenden Elemente des Generators 1. Der Rotor 2 rotiert im Betrieb des Generators 1 um die Rotationsachse Z. Zwischen dem Rotor 2 und dem Stator 3 ist ein Luftspalt 17 angeordnet. Da im Betrieb des Generators 1 der Rotor 2 um den im Zentrum des Generators 1 angeordneten Stator 3 rotiert, ist im Rahmen des Ausführungsbeispiels der Generator 1 als sogenannter Au- ßenläufer realisiert. Permanent magnets for generating a magnetic field, which are not shown for clarity. The rotor 2 comprises the elements of the generator 1 which rotate about the rotation axis Z during operation of the generator 1. The rotor 2 rotates about the rotation axis Z during operation of the generator 1. An air gap 17 is arranged between the rotor 2 and the stator 3. Since, during operation of the generator 1, the rotor 2 rotates about the stator 3 arranged in the center of the generator 1, in the exemplary embodiment the generator 1 is realized as a so-called external rotor.
Der Stator 3 weist dabei als wesentliches Element ein Joch 21 auf. Das Joch 21 besteht dabei im Rahmen des Ausführungsbei- spiels aus in Richtung der Rotationsachse Z hintereinander angeordneten Blechen, die zusammengenommen ein sogenanntes Blechpaket bilden. Die einzelnen Bleche sind dabei in der Re¬ gel mit einer elektrischen Isolierschicht, z.B. einer Lack- Schicht, versehen. Die Bleche weisen in Richtung der Rotationsachse Z durch die Bleche verlaufende Ausnehmungen auf, in denen die elektrischen Wicklungen des Stators angeordnet sind. In FIG 1 sind dabei die Enden 4 einer Wicklung, die an den längsseitigen Enden aus den Blechen heraustreten, darge- stellt. Das Joch 21 besteht im Rahmen der Erfindung aus einem Blechpaket. Es ist aber auch möglich, dass das Joch 21 anstatt aus einzelnen Blechen zusammengesetzt, massiv ausgebil¬ det ist und aus einem Vollmaterial, wie z.B. aus einem oder mehreren massiven Eisenwerkstücken, besteht. The stator 3 has a yoke 21 as an essential element. The yoke 21 consists in the context of the exemplary embodiment. play from in the direction of the rotation axis Z successively arranged sheets, which together form a so-called laminated core. The individual sheets are thereby provided in the re ¬ gel with an electrically insulating layer, for example a lacquer layer. The sheets have in the direction of the axis of rotation Z through the sheets extending recesses in which the electrical windings of the stator are arranged. In FIG. 1, the ends 4 of a winding emerging from the sheets at the longitudinal ends are shown. The yoke 21 is in the context of the invention of a laminated core. But it is also possible that the yoke 21 is composed instead of individual sheets, solid ausgebil ¬ det and consists of a solid material, such as one or more massive iron workpieces.
Weiterhin weist der Stator 3 im Rahmen des Ausführungsbeispiels zwei Lüfter 6a und 6b auf, die über einen eigenen elektrischen Antrieb 22a und 22b verfügen. Da die Lüfter 6a und 6b nicht von der Rotation des Rotors 2 abhängen, sondern jeweilig einen eigenen ihnen zugeordneten elektrischen Antrieb (Elektromotor) aufweisen, werden solche Lüfter fachspezifisch auch als sogenannte Fremdlüfter bezeichnet. Furthermore, in the exemplary embodiment, the stator 3 has two fans 6a and 6b, which have their own electric drive 22a and 22b. Since the fans 6a and 6b do not depend on the rotation of the rotor 2, but each have their own electrical drive (electric motor) assigned to them, such fans are also referred to as so-called external fans in a specific manner.
Die Lüfter 6a und 6b weisen eine Lufteintrittsöffnung 8a und 8b auf. Die beiden Lüfter 6a und 6b saugen beim Betrieb der Lüfter Luft aus der Umgebungsluft des Generators 1 an, was durch zwei Pfeile 7a und 7b in Figuren dargestellt ist. Es sei an dieser Stelle angemerkt, dass die in den Figuren 1, 2 und 3 dargestellten Pfeile die Richtung des Luftstroms, der zur Kühlung des Stators dient, darstellen. The fans 6a and 6b have an air inlet opening 8a and 8b. The two fans 6a and 6b suck in the operation of the fan air from the ambient air of the generator 1, which is represented by two arrows 7a and 7b in figures. It should be noted at this point that the arrows shown in Figures 1, 2 and 3, the direction of the air flow, which serves to cool the stator represent.
Weiterhin weist der Stator 3 zwei in Richtung der Rotationsachse Z verlaufende Eintrittskanäle 5a und 5b auf, in die die Lüfter 6a und 6b die aus der Umgebungsluft angesaugte Luft hinein blasen, wobei der Lüfter 6a die Luft in den Eintrittskanal 5a bläst und der Lüfter 6b die Luft in den Eintrittska¬ nal 6b bläst. Die Eintrittskanäle 5a und 5b sind dabei derart angeordnet, dass sie die von den Lüftern angesaugte Luft am Joch 21 des Stators 3 über die in Richtung der Rotationsachse Z verlaufende Länge 1 des Jochs 3, an einer dem jeweiligen Eintrittskanal zugeordneten Stelle des Jochs 3, verteilen. Um eine gute Kühlung des Stators zu realisieren sind am Joch im Bezug auf die Rotationsachse Z in Umfangsrichtung T des Jochs 21, entlang dem Joch 21 verlaufende, über die Länge 1 des Jochs 21 verteilte Kühlkanäle angeordnet, wobei der Über¬ sichtlichkeit halber in FIG 1 nur zwei Kühlkanäle 16a und 16b mit einem Bezugszeichen versehen sind und in FIG 3 nur einFurthermore, the stator 3 has two inlet channels 5a and 5b extending in the direction of the rotation axis Z into which the fans 6a and 6b blow the air drawn in from the ambient air, the fan 6a blowing the air into the inlet channel 5a and the fan 6b blowing the air air into the Eintrittska ¬ nal 6b blows. The inlet channels 5a and 5b are arranged such that they sucked by the fans air at Joch 21 of the stator 3 on the extending in the direction of the axis of rotation Z length 1 of the yoke 3, at a location associated with the respective inlet channel of the yoke 3, distribute. In order to realize a good cooling of the stator are arranged on the yoke with respect to the axis of rotation Z in the circumferential direction T of the yoke 21, along the yoke 21 extending over the length 1 of the yoke 21 distributed cooling channels, the over ¬ sake of clarity in FIG only two cooling channels 16a and 16b are provided with a reference numeral and in FIG 3 only one
Kühlkanal 16a mit einem Bezugszeichen versehen ist. In FIG 2 sind die Kühlkanäle 16a, 16a' 16b und. 16b' dargestellt. Um ein Austreten der Luft in radiale Richtung R auf die Rotationsachse Z zu aus den Kühlkanälen heraus zu verhindern, weist der Stator 3 kreisförmig gebogene Bleche 11, IIa, IIa', IIb und IIb' auf. Cooling channel 16a is provided with a reference numeral. In Figure 2, the cooling channels 16a, 16a '16b and. 16b 'shown. In order to prevent leakage of the air in the radial direction R on the rotation axis Z out of the cooling channels out, the stator 3 circularly curved sheets 11, IIa, IIa ', IIb and IIb' on.
Weiterhin weist der Stator 3 im Rahmen des Ausführungsbeispiels zwei in Bezug auf die Eintrittskanäle 5a und 5b in Um- fangsrichtung T des Jochs 21 versetzt angeordnete Austritts¬ kanäle 20a und 20b auf. Im Rahmen des Ausführungsbeispiels sind dabei die Austrittskanäle in Umfangsrichtung T des Jochs 21 in Bezug auf die Rotationsachse Z um 90° versetzt angeord¬ net, wie leicht in FIG 2 zu erkennen ist. Die Versetzung muss nicht unbedingt 90° betragen, wobei ein Winkel von 90° bei der Anordnung gemäß dem Ausführungsbeispiel jedoch sicherstellt, dass der Stator 3 und insbesondere das Joch 21 über den gesamten Umfang des Stators 3 gekühlt wird. Bezüglich der FIG 1 ist anzumerken, dass die mit dem Bezugs¬ zeichen 12 versehene Kontur der beiden Austrittskanäle 20a und 20b im Bezug auf die Rotationsachse um 90° gegenüber der Realität versetzt dargestellt ist, um die Eintrittskanäle 5a und 5b und die Austrittskanäle 20a und 20b innerhalb der in FIG 1 dargestellten Zeichenebene gemeinsam innerhalb der FIG 1 darstellen zu können. Wie in FIG 2 dargestellt, ist der Eintrittskanal 5a über die Kühlkanäle 16 und 16a' und der Eintrittskanal 5b über die Kühlkanäle 16b und 16b' mit den Austrittskanälen 20a und 20b derart verbunden, dass die Luft von dem Eintrittskanal 5a durch die Kühlkanäle 16a und 16a' und die Luft vom Eintritts¬ kanal 5b durch die Kühlkanäle 16b und 16b' hindurch in die Austrittskanäle 20a und 20b strömt, was durch die entspre¬ chende Pfeile in FIG 1, FIG 2 und in FIG 3 dargestellt ist. Die Luft strömt anschließend durch im Bereich der Austritts- kanäle 20a und 20b angeordnete Öffnungen 15a und 15b des Sta¬ tors 3 und durch über den Umfang des Rotors 2 verteilte Luft¬ austrittsöffnungen 23 aus dem Generator 1 in die Umgebungsluft heraus. Die Luft wird dabei von den Austrittkälen 20a und 20b in die Umgebungsluft des Generators 1 in Richtung der Rotationsachse Z des Generators 1 abgegeben. Die Luftaus¬ trittsöffnungen 23 sind dabei im Bezug auf die Lufteintritts¬ öffnung 8a und 8b in Richtung der Rotationsachse Z am gegenü¬ berliegenden Ende des Generators 1 angeordnet. Die Pfeile 9a und 9b in den Figuren zeigen den Austritt der Luft aus den beiden Austrittskanälen 20a und 20b. Further, the stator 3 in the context of the embodiment two in relation to the inlet channels 5a and 5b in the circumferential direction T of the yoke 21 are arranged offset ¬ outlet channels 20a and 20b. In the context of the embodiment, the outlet channels in the circumferential direction T of the yoke 21 with respect to the rotation axis Z offset by 90 ° angeord ¬ net, as can be seen easily in FIG. The offset need not necessarily be 90 °, with an angle of 90 ° in the arrangement according to the embodiment, however, ensures that the stator 3 and in particular the yoke 21 is cooled over the entire circumference of the stator 3. With regard to FIG. 1, it should be noted that the contour of the two outlet channels 20a and 20b provided with the reference symbol 12 is shown offset in relation to the axis of rotation by 90 ° with respect to reality, around the inlet channels 5a and 5b and the outlet channels 20a and 20b within the drawing plane shown in FIG 1 together within FIG 1 to represent. As shown in FIG. 2, the inlet channel 5a is connected via the cooling channels 16 and 16a 'and the inlet channel 5b via the cooling channels 16b and 16b' to the outlet channels 20a and 20b such that the air from the inlet channel 5a through the cooling channels 16a and 16a 'and the air from the inlet channel ¬ 5b through the cooling channels 16b and 16b' passes into the outlet channels 20a and 20b, which is represented by the entspre ¬ sponding arrows in Figures 1, 2 and in Fig. 3 The air then flows out through channels in the region of the exit 20a and 20b arranged openings 15a and 15b of Sta ¬ tors 3 and distributed over the circumference of the rotor 2 ¬ air outlet openings 23 of the generator 1 in the ambient air. The air is discharged from the exit channels 20a and 20b into the ambient air of the generator 1 in the direction of the axis of rotation Z of the generator 1. The Luftaus ¬ outlet openings 23 are arranged in relation to the air inlet ¬ opening 8a and 8b in the direction of the axis of rotation Z at gegenü ¬ overlying end of the generator 1. The arrows 9a and 9b in the figures show the exit of the air from the two outlet channels 20a and 20b.
Im Rahmen des Ausführungsbeispiels sind die Kühlkanäle in Form von Nuten realisiert. So weist solchermaßen das Joch 21 im Bezug auf die Richtung der Rotationsachse Z in Umfangs- richtung T des Jochs 21 verlaufende Nuten auf, wobei der Übersichtlichkeit halber nur eine Nut 16a in FIG 3 darge¬ stellt ist. Die Nuten können dabei z.B. durch entsprechende Ausbildung und hintereinander Anordnung der Bleche des Jochs, beim Herstellen des Blechpakets realisiert werden oder z.B. mittels eines entsprechenden Fräsers aus dem fertigen Blechpaket herausgefräst werden. Falls das Joch massiv ausgebildet ist und aus einem Vollmaterial, wie z.B. aus einem oder meh¬ reren massiven Eisenwerkstücken, besteht, können die Nuten entsprechend mittels eines Fräsers herausgefräst werden. Al- ternativ können die Kühlkanäle aber auch z.B. durch Rohrleitungen, insbesondere Rohrleitungen, die einen quadratischen oder rechteckförmigen Querschnitt aufweisen und am Joch in Umfangsrichtung T des Jochs 21 verlaufen und einen wärmeleitenden Kontakt mit dem Joch aufweisen, realisiert sein. In the context of the embodiment, the cooling channels are realized in the form of grooves. So in this way, the yoke 21 with respect to the direction of the rotation axis Z in the circumferential direction T of the yoke 21 extending grooves, wherein the sake of clarity only one groove 16a Darge ¬ represents in FIG 3. The grooves can be realized, for example, by appropriate training and successive arrangement of the plates of the yoke, during manufacture of the laminated core or be milled eg by means of a corresponding cutter from the finished laminated core. If the yoke is solid and made of a solid material, such as, consists of one or meh ¬ reren solid iron workpieces, the grooves can be milled out correspondingly by means of a cutter. Alternatively, however, the cooling channels can also be formed, for example, by pipelines, in particular pipelines, which have a square or rectangular cross-section and are arranged on the yoke in FIG Circumferential direction T of the yoke 21 run and have a heat-conducting contact with the yoke, be realized.
Bei dem gezeigten Ausführungsbeispiel weist der Generator zwei Lüfter und entsprechend zwei Eintritts- und zwei Aus¬ trittskanäle auf. Selbstverständlich kann der Generator aber auch nur einen einzelnen Lüfter und nur einen einzelnen Eintrittskanal und nur einen einzelnen Austrittskanal aufweisen oder aber er kann auch mehr wie zwei Lüfter und folglich auch mehr wie zwei Eintrittskanäle und auch mehr wie zwei Aus¬ trittskanäle aufweisen. In the illustrated embodiment, the generator has two fans, and, correspondingly, two inlet and two from ¬ passageways. Naturally, however, the generator may also include only a single fan and only a single inlet channel and only a single outlet channel, or it can also be more like two fans and thus also have more like two inlet channels and more like two From ¬ passageways.
Der erfindungsgemäße Generator dient zur Erzeugung von elekt¬ rischer Energie. The generator according to the invention is used to generate elekt ¬-driven energy.

Claims

Patentansprüche claims
1. Generator , wobei der Generator (1) einen ruhend angeordneten Stator (3) und einen um eine Rotationsachse (Z) ro- tierbar angeordneten Rotor (2) aufweist, wobei der Stator (3) ein Joch (21) und einen Lüfter (8a) aufweist, der Luft aus der Umgebungsluft des Generators (1) ansaugt, wobei der Sta¬ tor (3) einen Eintrittskanal (5a) aufweist in den der Lüfter (6a) die Luft bläst, wobei der Eintrittskanal (5a) derart an- geordnet ist, dass er die vom Lüfter (6a) angesaugte Luft am Joch (21) über die in Richtung der Rotationsachse (Z) verlaufende Länge (1) des Jochs (21) verteilt, wobei am Joch (21) in Umfangsrichtung (T) des Jochs (2) verlaufende, über die Länge (1) des Jochs (21) verteilte Kühlkanäle (16a, 16a') an- geordnet sind, wobei der Stator (3) einen im Bezug auf den1. Generator, wherein the generator (1) has a stationary arranged stator (3) and about a rotation axis (Z) rotatably arranged rotor (2), wherein the stator (3) has a yoke (21) and a fan ( 8a) which sucks in air from the ambient air of the generator (1), the stator (3) having an inlet channel (5a) into which the fan (6a) blows the air, the inlet channel (5a) being such is arranged to distribute the air sucked in by the fan (6a) at the yoke (21) over the length (1) of the yoke (21) running in the direction of the axis of rotation (Z), the yoke (21) being circumferentially (T) the yoke (2) extending over the length (1) of the yoke (21) distributed cooling channels (16a, 16a ') are arranged, wherein the stator (3) with respect to the
Eintrittskanal (5a) in Umfangsrichtung (T) des Jochs (2) versetzt angeordneten Austrittskanal (20a) aufweist, wobei der Eintrittskanal (5a) über die Kühlkanäle (16a, 16a') mit dem Austrittskanal (20a) derart verbunden ist, dass die Luft von dem Eintrittskanal (5a) durch die Kühlkanäle (16a, 16a') hin¬ durch in den Austrittskanal (20a) strömt, wobei der Generator (1) derart ausgebildet ist, dass die durch den Austrittskanal (5a) strömende Luft in die Umgebungsluft des Generators (1) abgegeben wird. Entry channel (5a) in the circumferential direction (T) of the yoke (2) arranged offset outlet channel (20a), wherein the inlet channel (5a) via the cooling channels (16a, 16a ') with the outlet channel (20a) is connected such that the air from the inlet channel (5a) through the cooling channels (16a, 16a ') through ¬ flows into the outlet channel (20a), wherein the generator (1) is designed such that the air flowing through the outlet channel (5a) in the ambient air of Generator (1) is discharged.
2. Generator nach Anspruch 1, dadurch gekennzeichnet, dass der Generator (1) derart ausgebildet ist, dass die Luft vom Austrittkanal (20a) in die Umgebungsluft des Generators (1) in Richtung der Rotationsachse (Z) des Generators (1) abgege- ben wird. 2. Generator according to claim 1, characterized in that the generator (1) is designed such that the air from the outlet channel (20 a) in the ambient air of the generator (1) in the direction of the axis of rotation (Z) of the generator (1) abgege ben will.
3. Generator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Joch (21) Umfangsrichtung (T) des Jochs (2) verlaufende Nuten aufweist und die Kühlkanäle (16a, 16a') durch die Nuten gebildet werden. 3. Generator according to one of the preceding claims, characterized in that the yoke (21) has circumferential direction (T) of the yoke (2) extending grooves and the cooling channels (16a, 16a ') are formed by the grooves.
4. Generator nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Generator (1) als Windkraftge¬ nerator ausgebildet ist. 4. Generator according to one of the preceding claims, characterized in that the generator (1) is designed as Windkraftge ¬ generator.
PCT/EP2010/065607 2009-10-21 2010-10-18 Generator WO2011048038A2 (en)

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EP10775740A EP2491642A2 (en) 2009-10-21 2010-10-18 Generator
CN201080047781.XA CN102577044B (en) 2009-10-21 2010-10-18 Generator

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CN102577044A (en) 2012-07-11
US9106109B2 (en) 2015-08-11
CN102577044B (en) 2015-04-29
EP2491642A2 (en) 2012-08-29
WO2011048038A3 (en) 2011-12-01
US20120205998A1 (en) 2012-08-16

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